EXHIBIT 5.3



                         CONSENT OF INDEPENDENT AUDITORS

We consent to the use of our joint audit report dated March 28, 2003 (except as
to note 14 which is as of May 28, 2003), incorporated by reference in the
Registration Statement on Form F-10 and related Prospectus of Research In Motion
Limited dated January 7, 2004 for the registration of 10,350,000 shares of its
common stock.

/s/ Ernst & Young LLP
Toronto, Canada
January 7, 2004